[PATCH 02/10] drm/atomic-helpers: Evaluate plane damage after atomic_check

[Thomas Zimmermann <tzimmermann@suse.de>]

Each plane's and CRTC's atomic_check might trigger a full modeset. As
this affects the plane's damage handling, evaluate damage clips after
running the atomic_check helpers.

Examples can be found in a number of drivers, such as ast, gud, ingenic,
mgag200 or vmwgfx, which all set mode_changed in the CRTC state to true.
Ingenic even reevaluates damage information in its plane's atomic_check.
Doing this after the atomic_check helpers ran benefits all drivers.

There's already a damage evaluation before the calls to atomic_check.
With a few fixes to drivers, this can be removed.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
---
 drivers/gpu/drm/drm_atomic_helper.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index a768398a1884..58edd122b922 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -1065,6 +1065,10 @@ drm_atomic_helper_check_planes(struct drm_device *dev,
 		}
 	}
 
+	for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) {
+		drm_atomic_helper_check_plane_damage(state, new_plane_state);
+	}
+
 	return ret;
 }
 EXPORT_SYMBOL(drm_atomic_helper_check_planes);
-- 
2.54.0